Calculating-machine.



No. 897,768. PATENTEDSEPT. 1, 1908. 0. L. NELSON.

CALCULATING MACHINE.

APPLICATION FILED NOV. 16, 1906.

12 SH-EETSSHBET lv WITNESSES WVENTOR A TTOHNE Y8 No. 897,768. PATENTED SEPT. l, 1908. G. L. NELSON.

CALCULATING MACHINE.

APPLICATION FILED NOV. 16, 1906.

12 SHEETS-SHEET 2.

WITNESSES 8 8 ,8 /NVEN7'0H A TTOHNEYS No. 897,768. PATENTED SEPT. 1, 1908. U. L. NELSON.

CALCULATING MACHINE.

APPLICATION FILED NOV. 16, 1906.

12 SHEETS-SHEET 4 INVENTOR ZJZsa/z/ ATTORNEYS PATENTED SEPT. 1, 1908. CALCULATING MACHINE. APPLICATION FILED NOV 16, 1906 R m N M N 12 SHEETS-SHEET 6.

G. L. NELSON.

A TTORNE Y6 PATBNTED SEPT. 1, 1908.

J c. L. NELSON. CALCULATING MACHINE. APPLICATION FILED NOV. 16, 1906.

12 SHIIBTSSHEBT 6.

W/TNESSES No. 897,768. PATENTED SEPT. 1, 1908.

' G. L. NELSON.

CALCULATING MACHINE.

APPLIOATION FI LED NOV. 16, 1906.

12 SHBETS-SHEET 8.

No. 897,768. PATENTED SEPT. 1, 1908. 0. L. NELSON. CALCULATING MACHINE.

12 SHEETSSHEET 9.

APPLIGATION FILED NOV.16, 1906.

T MM W W M V/ u A TTOHNE Y8 PATENTED SEPT. 1, 1908.

C. L. NELSON. CALCULATING MACHINE.

APPLICATION FILED NOV. 16, 1906.

12 SHEETS-SHEET 10.

A TTOHNE YS No. 897,768. PATENTED SEPT. 1, 1908.

C; L. NELSON." CALCULATING MACHINE.

APPLICATION TILED NOV. 16, 1906.

12 SHEETS-SHEET 11.

' f ATTORNEYS No. 897,768. PATENTED SEPT. 1, 1908. G. L. NELSON.

CALCULATING MACHINE.

APPLIOATION FILED NOV. 16, 1906.

12 SHEETS-SHEET l2.

INVENTOH C QTZZ.W'ZJ0IZ A TTOHNE YS CARL L. NELSON, OF SEATTLE, WASHINGTON.

CALCULATING-MACHINE Specification of Letters Patent.

Patented Sept. 1, 1908.

Application filed November 16, 1906. Serial No. 343,713.

To all whom it may concern:

Be it known that I, CARL L. NELSON, a citizen of the United States, and a resident of Seattle, in the county of King and State of Washington, have invented a new and Improved Calculating-Machine, of which the following is a full, clear, and exact description.

The purpose of the invention is to provide a calculating machine that will tabulate, i. e. produce or print in column form the figures added by the mechanism of the machine and produce at the foot of the column the sum-total of the figures of the column-in a diiierent color of ink than that used to print the individual figures in the column.

A further purpose of the invention is to provide a mechanism whereby credits can be printed in red forexample upon a slip delivered from the-machine so as to appear in a column of figures. to be added but remaining independent of such figures for an addition and the total of the figures, and whereby the total of any column of figures can be added to if necessary, and a grand total be obtained without in any manner interfering with the first total obtained and printed. 7

Another purpose of the invention is to provide a machine whereby perfect and uniform. column Work is obtained.

A further purpose of the invention is to provide a construction whereby multiplication as well as addition can be performed and by means of which an arbitrary sum can be added to the slip of tape at any time before ures.

it leaves the machine.

It is also a purpose of the invention to carry out the above-mentioned steps in a comparatively simple and direct and reliable manner, and to so construct and group all the working parts that they will not be liable to disarrangement, and whereby also reliable results will be obtained under all conditions of ordinary usage.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings forming a part of this specific'ation, in which similar characters of reference indicate corresponding parts in all the fig Figure 1 is a perspective view of the machine; Fig. 2 isa plan view of the. machine with the casing removed; Fig. 3 is a transverse vertical section taken practically on the line 33 of Fig. 2, looking in direction of the arrow; Fig. 4 is a rear elevation showing the casing in section; Fig. 5 is a vertical longitudinal section taken practically on the, line 55 of Fig. 2 Fig. 6 is a similar view to that shown in Fig. 5, showing one of the keys pressed and the parts in a position ready to print a number; Fig. 7 is an enlarged detail longitudinal sectional view of the hammer mechanism and the controlling means for the hammer mechanism; Fig. '8 is a plan view of the hammer controlling means shown in Fig. 7; Fig. 9 is an end view of the same; 10 is a side elevation partly in section, of one of the type bars; Fig. 11 is a plan view of the same; Fig. 12 is a longitudinal vertical section taken substantially on the line 1212 of Fig. 2; Fig. 13 is a longitudinal vertical section taken practically on the line 1313 of Fig. '2; Fig. 14c is a vertical transverse section through the key-board, the section being taken p1 ,ctically on the line 14-14 of Fig. 2; Fig. 15 is a horizontal sec-- tion taken substantially on the line 15-15 of Fig. 14; Fig. 16 is a plan view of the carriage removed from the machine; Figs. 17 and 18 are detail views of controlling levers for the type wheels; Fig. 19 is a side elevation of one of the type wheels Fig. 20 is an edge view of the same; Fig. 21 is a sectional side elevation of a portion of the lower rack of a type bar and locking device; and Fig. 22 is a detail sectional view through a portion of the outer casing of the machine and the stop latch for the adding mechanism carried thereby.

The casing A may be of any desired form and is provided with a bottom 10 upon which bottom a carriage B is mounted to slide to and from the forward portion of the said bot tom, the normal position of the rear end of the carriage being near the rear end of the machine and the normal position of the iron 5 portion of the carriage being in engagement with the forward portion or": the machine as shown in Fig. 12.

The carriage extends nearly the width between the sides of the casing, or the width of the floor 10 upon which it has sliding move ment. The carriage is shown in detail plan view in Fig. 16 and is constructed of metal. In the detail of its construction a rear member 11 is provided, the outer rear face whereof is straight; and from the sides of th:

carriage at the end portions of the end member 11, rearwardly-extending lugs 12 are formed; and at the outer face of each lug 12 a friction roller 13 is mounted. These friction rollers serve to render the movement of the carriage more or less free on the floor or partition 10, and likewise act at their rearward movement to bring about certain movements on the part of the ribbon-controlling mechanism, as will be hereinafter particularly described.

in addition to the arts named, the carriage consists of aral el side members I) and the member gbeing the ri ht-hand side member and the member I) theTeft-hand side member. The forward face of the end member 11 of the carriage is downwardly and forwardly inclined, as is shown at 18 in Figs. 5, 6, 12, 13 and 16; and this inclined surface 18 at the, forward movement of the carriage operates a type-alining device also to be here-v inafter described.

The uoper edge of the right-hand side member of the carriage B is provided with an upward extension 19, shown particularly in Figs. 13 and 16, the extension being referably of triangular shape as is articu arly shown in Fig. 13. A correspon ing projection 20 is provided for the left-hand side member 1) as is illustrated in Figs. 5, 12 and 16. Alining pins 21 extend horizontally from the outer faces of the said side members b and b at the aforesaid extensions 19 and 20, and these pins, as will be hereinafter described, are 'adapted'in the forward movement of the carriage to ermit a locking device for the adding wheels to operate to hold the same in an upper position and at the rearward movement of the carriage tend to release the said wheels from said device as will be also hereinafter fully described.

A cam track 22 is produced upon the inner face of the projection or extension 19 from the right-hand side member of the carriage. Said track, as is particularly shown in Fig. 13, is provided preferably with a straight under surface 22 an upwardly and forwardly inclined upper surface 22 a downwardly and forwardly-inclined forward surface 22' and a lower rearwardly-inclined surface 22 The rejection 19 extends not only up but also own below the body of the right-hand member I) of the carrier as is shown in Fig. 13, which lower extension is designated as 23* and is below the cam track 22, being adapted to travel in a longitudinal slot 24 made in the bottom 10 of the casing at its rear as is also shown in Fig. 13.

At the inner face of the left-hand member I) of the said carriage a projection 25 is made, corresponding to the cam 22 at the opposite side of the carriage, and said projection 25, as is clearly shown in Figs. 5 and 12, consists of a straight horizontal upper face 25*, a downwardly and rearwardly inclined rear edge 25 and a downwardly and forwardly inclined forward edge 25". The objects of the elements 22 and25 will be shortly explained in detail;

The forward end of the left-hand carriage member 1) is carried down to form a lug 14 that extends into a longitudinal slot 15 produced in the bottom 10 at the forward lefthand portion thereof as is illustrated in Fig. 12 and a spring 16 is attached to the lug 14 and to the under face of the bottom 10 of the casing near the rear of the latter as is indicated at 16 in Fig. 12, the tendency of which spring is to draw the carriage forward and the forward end of the right-hand member 6 of said carriage is provided with an upwardlyextending' lug 17 as is shown in Fig. 13.

The carriage is actuated from a main shaft 26, which extends through from side to side of the casing about centrally between its ends, and is provided at its right-hand end with a crank handle 27, whereby the shaft is turned. This crank handle 27 has an extension 27 which is carried down through a suitable opening preferably formed in the bottom of the casing adjacent to its inner right-hand face; and between said righthand face of the casing and an apron 29 that extends from the bottom of the said casing,

as is shown in Fig. 13.

A curved rack 30 is produced on the outer face of the apron 29, as is shown by dotted lines in Fig. 13, adapted to be engaged by a pawl 31 rovided with a weight 32 and carried at t e lower end of the extension 27 from the handle 27. The said weighted pawl is ada tedto insure the handle 27 being given itsfnll movement to the rear of the machine during its operation in adding, as far as it is intended that it shall go, preventing the handle being brought forward again until the full rearward throw has been executed.

The direct movement is given to the carriage B through the medium of an arm 33 which is attached to the central portion of the'shaft 26 and extends down through a longitudinal slot 34 produced in the bottom 1.0 of the casing about centrally between its sides asis shown inFig. 5, and said arm 33 is connected by a link 35 with a downward projection 36 from the central portion of the rear member, of said carriage B as is also shown in Fig. 5. Thus when the handle 27 is moved to the rear, which is the movement to effect an addition and the printing of an addition, the carriage B is moved forward and its spring 16 is placed under tension, and when the handle 27 is permitted to drop downward and forward the spring 16 returns the carriage to its rear or normal position.

Two or more type bars C, shown in detail in Fig. 10 are employed in connection with the machine. in the machine illustrated six of the said type bars are employed, each type bar being adapted to print the figures of one type-carrying arm of each type har.

vertical line in a general column of figures of six digits each, for example, but it will be understood that any desired number of these type bars may be employed.

In the construction of a type bar an upper horizontal type-carrying arm 37 is employed,

provided with a series of vertical pockets 38 extending through from top to bottom, each of which pockets contains a type 39. The faces of these type read from the forward type to 9 inclusive, which appears on the rearmost type. These type'are adapted to be thrown up by hammers to be hereinafter described, a hammer being provided for Itpe 10 type falls by gravity, assisted by a spring, and in order to limit the upward and downward movement of the type 39 each type is provided with upper and lower horizontal extensions 39, all pointing preferably in a rearward direction as shown in Fig. 10, the upper extensions in the normal position of the type resting upon the upper face of the type-carrying arm 37, and when a type is forced up its lower extension or projection will engage with the under face of the said type-carrying arm. It may be here remarked that a downwardly-extending pin 37 extends from the under face of the said arm 37 to the rear of the series of type 39.

The pockets 38 in which the type 39 have movement extend through one side of the type-carrying arm 37 as is shown in Fig. 11, so that the type may be readily introduced therein, and a strip 40 is made to cross the open side portions of all of the pockets so as to hold the type in place as is also shown in Fig. 11. The type-carrying arm 37 is also provided at the rear of the type 39 with a series of notches 40 in its upper face, the notches being also ten in number, corresponding to the number of type 39. The type-carrying arms 37 are held in parallel order, one independent of the other and close to one another at a point centrally between the sides of the machine and adjacent to its longitudinal center as is best shown in Fig. 2.

Each type-carrying arm 37 is supported at its rear end by a standard 42; but the upper portions 41 of these standards are curved inward, or are suitably curved to provide for the position of the type-carrying arms 37 employed as stated; but the said standards 42 are spaced an equal distance apart at the bottom 10 of the casing as is particularly shown in Fig. 4. The standard section 42 of a type bar is provided with a foot 43 at its lower end, having a suitable notch 44 therein to receive one end of a spring 45; and the springs of all of thctype bars employed are carried forward and are secured to the for ward under face of the bottom 10 of the cas ing as is shown in Figs. 5 and 6. The foot sections 43 of the type bars 0 extend down through slots 47 produced in the rear portion of the bottom 10 of the casing, three slots being at each side of the central slot 34 heretofore mentioned; and it may be here remarked that a central slot 36 is also produced in the bottom 10 of the casing for the passage of the downwardly-cxtemling member 36 from the carriage B.

a A horizontal rack arm 48 is secured to the standard member 42 of each type bar employed, and the rack arm 43 of a type bar extends forwardly a greater distance than does the typecarrying bar 37 and is provided with teeth 49 upon its under face. A support or brace 50 is provided for the rack arm 4S, located at the rear of its teeth, and the said support 50 is secured at its lower end to a lower plain arm 52, parallel with the rack arm 48, which may be termed the horizontal body arm of the type bar; and a loop extension 51 is carried down from the brace or support 50 for the rack arm 48, and said loop extension 51 acts as a guide for a lower rack arm 53 parallel with and nearly of the same length as the upper rack arm 48. The teeth 54 of the lower rack arm 53, however, face upward. The lower rack arm 53 is adapted for end movement, the extent of this movement being that of one notch, as indicated by dotted lines in Fig. 10. Therefore the movable rack arm 53 is provided with a downwardly-extending heel member 55, having a rear extension 56 that is made to enter a recess 57 in the lower end 42 of a standard 42, which lower end portion 42 of the standard is thicker than the other portions thereof as clearly shown in Fig. 4. Thus the lower rack arm 53 is guided in its. movement between its ends and at its rear end.

The standard member 42 of each type bar is provided with a friction roller 58 adjacent to its lower end, which rollers are adapted to travel on the upper face of the bottom 1() of the casing and render the movement of the type bars as smooth as possible. A spring 59 is secured to the lower end of the loop extension 51 from the brace or support 50 and to the lower portion of the lower rack arm 53 forward of its dotted position shown in Fig. 10. Thelower or body arm 52 of a type bar 0 is provided with a forwardly-extending horizontal finger C, connected with and extending down from the forward portion of the body arm 52 preferably slightly to one side thereof as is shown in Fig. 11; and the said finger member C of a type bar 0 is provided with three steps or recesses in its inner face at its forward or outer end, the inner step being designated as 60, the next outer step as 61 and the third step as 62. This latter step constitutes the forward extremity of the finger as is particularly shown in Fig. 11. The stepped portions of the fingers of the various type bars employed extend under and operate in connection with a bank of ee'mes keys at the forward end portion of the casl rearward through a suitable guide 72 and ing, to be hereinafter particularly referred to. The forward movement of a type bar C is limited by a stop 63 on its steppedfin er member 0 engaging with a'preferably yiel ing barrier 64 which straddles the various finger members C and is located on the bot tom 10 of the casing to the rear of the key rFnechanism above referred to as is shown in In the construction of a finger member'C of a type bar C it is referably provided with a recess 56 at its ower portion, extending from its forwardend to the said stop 63, so as to render the type bar thinnest at such oint.

ner position shown by full lines in Fig. 10,

the s ring 59 being placed at such time under s ight tension; and the means employed for the purpose consists of an arm 65 pivoted at, its rear end 66 to the standard member 42 v gagement with the under face of the sliding rack arm 53 by means of a spring 69' carried by the body arm 52 and engaging with the under face of the locking arm 65 as is also shown in Fig. 10. When the lower rack arm 53' is moved outward the locking arm 65 is pressed from engagement therewith, permittin the spring 59 to act.

he lower rack arm 53 of a ty e bar C is brought into action when the ad ing mechanism is operatingto'ndd and to print col umns of figures. The upper rack 48 acts in conjunction with said adding" inechanism only when a total is to be printed; and the lower r ack arm 53 is moved outward to its dotted osition when it is necessary to carry a num er, carry tens, for example, in the adding operation.

The type bars 0 are moved back against the tension of their springs 45 by the rear straight portion 11 of the carriage engaging with the lower portion of the standard members of the said type bars as the carriage moves rearward; but while the carriage is assisted in-its return movement by its spring '16, it is necessary to exert considerable force in order to overcome the resistance of the springs 45 connected with the side bars C. To that end I employ a mechanism best shown in Fig. 1.2 to act in connection with the projection 25 on the left-hand member I) of the carriage B. I This mechanism consists of an arm 70, which is fulcrumed upon an upright 71 extending up from the bottom of the casing and the said arm extends Tl a movable rack arm 53 of the type ar is normally held stationary and in its in- 25 and the straight intermediate top surface 25", the arm being held down by means of springs 74 secured to the arm and to a frame 75 that extends below the under face of thebottom of the casin As the carriage moves rearward, the ro ler traveling down the forward inclined surface 25 of the said projection 25 will tend to quickly force or urge the carriage B in a rearward direction or to its normal position as shown in Fig. 12, thus greatly assisting the controlling spring of said carriage.

A compartment (1 is formed in the forward portion of the casing A, over which compartment a key mechanism D is located, as is best shown in Figs. 5, 6 and 14. The inner wall 10f this compartment (Z is the yielding barrier 64 against which the stops 63 on the type levers C strike when said type members reach the limit of their forward movement,

' as has been described, and bridge blocks 77 are located at intervals at the inner side of the barrier 64 as is best shown in Fig. 15. Trunnions 78 at the upper end portions of a series of stop leaves 76 are journaled in said "blocks 77 and in the forward end wall of the casing, as is shown in Figs. 5 and 6. These levers occupy normally the downwardly-inclined position shown in Fig. 14, being held in such position by spring 79 located at their forward ends, and other springs 80, attached to their inner or rear ends, extend over the aforesaid blocks 77 and barrier 64, as =isalso shown in Figs. 5 and 6. One of these stop leaves 76 is provided for each-type lever C employed; and normally the free longitudinal edge of a leaf at its rear end is immediately op )osite the stepped end of a finger C of each type lever C as is illustrated particularly in Fig. 14; and the said leaves prevent the type bars 0 from leaving their rear or normal position until the stop leaf in front of a particular type bar is pressed downward, and this movement is act omlished through the inediumof a group of eys 83 forming a portion of the key mechanisin above referred to. 1 Before describing the key mechanism in detail it may be here stated that a bar 81 is held above the springs 80 at the'inner ends of the sto leaves 76 as is shown in Figs. 5 and 6, whic bar is provided with arms 81 that terminate in eyes, which eyes are mounted to turn on a shaft 82. The said bar 81 is normally held from engagement with the springs 80 at the inner ends of the stop leaves 76 by means of one or more springs 82*, attached to the said bar and having bearing usually against the under face of the main shaft26 as is shown in Fig. 13. When-it is desired to carry all of the stop leavesfromsevnes out of the path of all of the type levers, the aid bar 81 is pressed downward by means of a mechanism to be hereinafter described.

The main frame A of the machine is usually made to rest in a base frame A, being supported upon brackets a contained in the base frame; but the base frame may beehanged in character and the main frame may be otherwise supported.

What may be termed the frame or body of the key mechanism D consists of a lower plate 84, an intermediate plate 84 and an upper plate 84". The lower plate 84 is over the stop leaves 76 as is shown in Fig. 14, and is supported ,by suitable end bars (i the intermediate plate 84 being supported by end bars (1, while the extreme upper plate 84 may simply rest upon the upper edge of the forward section of the main casing A as is also shown in Fig. 14.

In addition to the keys 83 which are brought into action when individual numbers are to be added, a repeating key 85 is also employed, and when said latter key is pressed downward the type last brought into action will be held for continuous printing and addition until the said repeating key is released. The main keys 83 are arranged in a number of longitudinal rows corresponding to the number of type bars C employed; and the main keys 83 are nine in each row, each-row reading from 1 at the upper key to 9 at the lower key, since a. cipher is always printed when none of said keys 83 is depressed. The keys 83 are also arranged in series of three in each row; that is to say, in one row the keys designated as 1, 2 and 3 would constitute one series; the. keys designated as 4, 5 and 6 would constitute a second series and the keys designated as 7, 8 and 9 the third series, and these series correspond to the steps 60, 61 and 62 in the type bars C. The keys 83 are passed loosely through the plates 84, 84 and 84 and their lower ends are over the various stop leaves 76, but are held normally out of engagement therewith, one of the said step leaves 76 being provided for each row of keys 83 as is shown by dotted lines in Fig. 15. Each key is limited in its upward movement by suitable shoulders 16 produced in its shank 83*, and each key 83 of a series or bank shown is provided with a notch 86 at the right-hand edge of its shank 83* located between plates 84 and 84 as is shown in Fig. 14. Each row of keys 83 is provided with a locking leaf 87, the said leaves being located opposite the notched edges of the said keys 83 as is also shown best in Fig. 14, their upper end port-ions being pivoted in the end supports for the intermediate frame plate 8 1 and the lower portions of the locking leaves,87 are inclined inward and normally enter recesses 87" below thev notches 86. When a key is pressed down in a row, the leaf of that row will leave the recess 87 a in which it has normally entered and will enter the notch 86 of the dc pressed key, holding said key depressed; and as said key is de ressed its lower end will carry downward t e stop leaf 76 below it and will permit the type bar belonging to that especial row of keys to move forward for action. The various key-locking leaves 87 are held up to their work by springs 88, preferabl having central bearing thereon.

If a key, for example, carrying the numeral 1 in the right-hand or unit row of keys 83 is pressed downward, the stop leaf 76 for that row of keys would be depressed and the right-hand or unit type bar C would move forwarduntil the step 60 struck the lower projecting end of the depressed key, at which time the numeral 1 on type-carrying member of the acting type bar C would be presented beneath the inking ribbon, so that when the hammer mechanism operating on the type struck the type representing the numeral 1, it would effect a printing of the same on a continuous-strip of paper or other material. If the key bearing the numeral 3 in the same or unit column was next pressed downward, the key 1 would be raised automatically in a manner to be hereinafter described, and then as the unit type bar moved forward it would continue its movement until the step 60 engaged with said key designated as 8, bringing the type carrying a corresponding number in position for an impression. If the key bear- 1n the numeral 6 in the second set of the unitco umn is pressed dou-nward, then the unit type bar would move forward until the step 61 engaged with the projecting end of the depressed key, bringing the type on the unit bar designated as 6 in position to be printed; and should the key bearing the numeral 9 at the extreme lower end of the unit column of the keys 83 be pressed downward, then the unit type bar would move forward untilits forward end or step 62 engaged the projecting end of the depressed key, and the consequence would be that the type in the typecarrying arm 37 of the said type bar carrying the numeral 9 would be placed in position for printing. The operation with reference to the rows of keys 83 and their corresponding type bars throughout is the same as has been .just described, it being understood that the first step 60 on a type bar G acts only upon the first set of three keys in the column bclonging to that bar; the second step 61 acts exclusively upon the intermediate set or group of keys 83, while the last step 62, the one furthest forward acts only on the final or lower group or set of thnee keys. Thus while the numerals on the keys 83 read from the rear forward, 1, 2 3% to 9 inclusive, the type in the type arms 3-7 of the type bars read from the front 1), 1, 2 to f) at the rear. Thus it will be observed that the reading of the numerals on the bank of keys 83 is just the reverse of Hence it will be readi y understood that the operation above described with reference to the keys and the type bars is rapidly and accurately accomplished.

The arrangement of the keys 83 in the series of threes is best shown in Fig. 5, in which figure all of the keys are elevated or in normal position, whereas, in Fig. 6 one of the keys is shown depressed, that which would for example carry the numeral 5. The keys 83 are normally held in their upper or elevated position shown in Fig. 5, by springs 89, which are attached to the intermediate plate 84 of the key-carrying frame, and to ins 90 which extend out preferably from t e rear sides of the said keys at a point between the plates 84 and 84*.

Below the key-locking leaves 87 a shifting bar 91 is mounted to slide transversely of the machine upon the lower plate 84 of the key mechanism D as is shown in Figs. 14 and 15; and the said shifting bar 91 is provided with a series of upwardly-extending pins 92, which pins in the normal position of the shifting bar shown in Fig. 1, engage with the lower end portions of the aforesaid key-locking leaves 87, but should the shifting bar be moved to the right hand side of the machine the pins would carry thelocking leaves 87 in the same direction, and thus remove any leaf that might be in the notch 86 of a key, taking it out therefrom and permitting the locked keys to be carried upward by their s rings 89 to normal position. This action talies place at each extreme forward movement of the carriage B, the shifting bar being returned to normal position at the return movement of the said carriage. The shifting bar is held in normal position usually by a spring 93 that extends from the forward end of the easing into a slot produced about centrally in the shifting bar 91; and said shifting bar 91 can be moved at will to release any key that may have accidentally been held locked in lower position by operating a lever 94 that extends out through an opening 94 in-the forward end of the casing, the lever being suitably fulcrumed upon the said lower plate 84 of the key mechanism and having its inner end entered into a slot in the'said shifting bar as is shown in Fig. 15.

If, however, it is desired to repeat any number or numbers expressed by the keys 83 previously pressed down, it is simply necessary to force down the repeating key 85 against the tension of a spring 85 suitably secured in the casing, and having upward bearing against a pin 555 secured to the shank of the said key 85 as is also particularly shown in Fig. 14. The lower end 95 of the key 85 is tapered and is bifurcated, and is made to enter a slot 96 at the left-hand end of the shifting bar 91; and the action of the said repeating key on the shifting bar when the key is pressed downward is to draw the shifting bar bodily in direction of the lefthand side of the machine and thus carry the ins 92 away from possible action on the ey-locking leaves 87 and to also prevent the carriage B from acting upon said shifting bar, since as stated the carriage as it moves forward acts upon the shifting bar 91 to release all of the keys that have been pressed down;

and on the return movement of the carriage the latter restores the shifting bar to its normal position. This action of the carriage is accomplished by horizontally mounting a trip bar 97 best shown at Fig. 13, at the inher right-hand side of the casing, suitable bearings 98 being rovided therefor. This ,trip bar is provide with a downwardly-extending finger 99 at its rear edge, and with a downwardly-extending pin 100 adjacent to its forward edge; and said bar 97 between its ends has a horizontal diagonal projection 101, shown best in Fig. 15, which engages with; the pro'ection from an angular head 102 at the rig t hand end of the shifting bar. Therefore, when the carriage B reaches about the limit of its forward travel the lug 17 on the carriage engaging with the pin 100 on the trip bar 97 will force the said bar forward and thus draw the shifting bar 91 toward the right-hand side of the machine, causing the release of all the key-locking leaves 87 which may be in looking position; and at the return movement of the carriage the lug 17 by engagement with the finger 99 at the rear of the said trip bar 97 will carry the said trip bar rearward and restore the shifting bar 91 to its normal position.

With reference to the adding mechanism, an arm 103 is pivoted to the inner side of the main frame A adjacent to the forward end 'of the said frame, the pivot pins for the said arms being designated as 104. These arms are horizontal except at a point 106 between' their ends, at which points the arms 103 are upwardly inclined as is shown in Figs. 12 and 13. The arms 103 extend rearward beyond the center of the said casing, and the rear ends of said arms 103 rest upon pins 107 secured to the sides of the casing, while at the inner or rear end of each arm 103 a narrower or finger section 108 is formed, and slightly at the rear of the inclined section 106 of each arm a bearing 109 is formed. These bearings 109 are adapted to carry the ends of a shaft 110, and on the said shaft 110 a series of disk wheels E are loosely mounted, said disk wheels being adding Wheels; and each disk wheel at what may be termed its inner face se'mea periphery into ten teeth at equal distances apart and of equal width, and each tooth is provided with a flange 115 at its outer edge at right angles to the body of the tooth as is also shown in Fig. 2. Upon the outer faces of these flanges the numerals are produced, reading 0, 1, 2, up to 9, inclusive.

The number of adding wheels E employed corresponds to the number of rack bars C;

and the pinions. 111 of the said adding disks i or wheels E are adapted to be located between the opposing rack arms 48 and 53 of the rack bars (3. In the adding operation the teeth of the pinions 111 engage with the teeth 54 of the lower rack arm 53, while in the operation of printing the total the teeth 49 of the fixed racks 48 engage with the said pinions, means being provided for lifting the carrying arms 103 for the said adding or calculating disks to bring about the above-mentioned result.

Forward of the shaft 110 for the adding or calculating disks E a shprter and independent shaft 116 is mounted to turn in bearings 116, supported from the bottom 10 of the casing. A lift arm 117 is secured to the lefthand end of the shaft 116, having bearing against the left-hand dogs 109 for said shaft 110, while a second arm 118, shown in Fig. 2,

is carried from the right-hand end of the shaft 116, having bearing against the righthand box for the disk shaft, whereby upon rocking the shaft 116 in one direction the carrying arms 113 for the calculating or adding disks E can be raised or lowered.

The left hand lift arm 1 17 is provided with a forward extension 119, having an inwardlyextending pin 120; and adjacent to the forward end of the extension 119 from the lift arm 117 a horizontal flange 105 is produced upon the upper edge of the left-hand supporting arm 103, a corresponding flange being formed on the right-hand supporting arm. A stop bar 121 is movably mounted above all of the calculating or adding disks E, extending transversely of the main casing; and said bar is provided with downwardly-extending teeth so spaced that the teeth of the said stop bar can be made to enter transversely alining u )per recesses 113 of all of the calculating or adding disks E to hold the said disks stationary when desired.

The spacing stop bar 121 is provided at each end with a downwardly-extending supporting arm 123 having a forward and downwardly extending extension124 pivoted to the inner faces of the main casing at the right and left hand side at a point 125, which point is located between the pivot 104 for the supporting arms 103 and the boxes or bearings 109 for the disk shaft 110.

A spring 126 has hearing at the extension ends12+t of the supporting arms 123 for the i stop bar 121, servin to normally hold.

same in engagemem .Jiilil pins 126 to cated at the sides of the casing as is shownjin mal position shown in said Fig. 12, its teeth 122 are held out of possible entrance in the spaces 113 at the margins of the disk wheels E, while the pinions 11 1 of said disks are in engagement with the teeth of the lower rack arms of the type barsC. But when the series of disks E are elevated by the elevation of their supporting arms 103, the stop bar 121 is simultaneously elevated, which is accomplished by the engagement of pins 122 extending from the under edges of the arms or extensions 124 of the sto bar with the flanges 105 at the upper edges of the supporting arms for the said disks E.

The shaft 11.6 carries a series of stop pawls 127 and a series of trip pawls 128. These pawls are in pairs, a trip pawl being placed close to each stop pawl. Each stop pawl is provided at that end which is mounted on the shaft 116 with a suitable eye 127, and each trip pawl 128 is likewise provided with an eye 128 at that end which is mounted on the shaft 116. The eyes of the trip pawls, however, are of greater diameter than the eyes for the stop pawls so that said trip pawls may have more latitude of movement. on the shaft than the stop pawls, and the eyes of both the stop and the trip pawls are provided with longitudinal slots 129 in their forward faces, the slot in the eyes of the trip pawls being wider than that in the stop pawls.

The associated stop and trip pawlsare spared by suitable collars 130 as is shown in Fig. 2; and a key 131 is passed through the slots 129 of all of the pawls and through corresponding" slots in all of the spacing sleeves, as is also shown in Fig. 2. Each stop pawl is provided with an upwardly extend ing tooth 132 at its free end and a weight 133 at the same end, which weights serve to normally hold the stop pawls in the lower position shown in Fig. 12, the outermost stop pawls bein r in engagement with stop lugs 134 carried )y the casing.

The stop pawls correspond in number to the number of disks E, and the number of trip pawls cprrcsponds to the number of type bars employed less the unit bar, as said bar is not provided with the locking arm heretofore mentioned. The pawls 127 and 12S extend rearwardly, and the stop pawls 127 occupy normally such a low position as not to interfere at that time with any of the. mechanism of the machine.

Each trip pawl 123 is provided with a head 128', and the heads of the said trip pawls loosely engage and slide upon the lock ing arms 65 of the type bars as is shown in Fig. 6; and when a disk has made a complete revolution the pin of that disk will engage with the p operating on the locking oining type bar to press one and the supporting arms 103, when the arm same and release the lower rack arm 53 of said type bar, causing it to slide out the distance of one tooth so as to move the adjoining disk E the distance of one tooth, thus carrying over the tens from one disk to the other in the operation of adding.

At the left-hand end of the shaft 116 a forwardly-cxtending curved arm 133 is secured to either a left-hand pawl 127 or 128; or to the left-hand spat-ing sleeve for the pawl, so that by pressing the arm 133 downward the stop pawls 127 will be raised while the trip pawls 128 will continue totravel on the locking arms but this operation of raising the stop pawls is performed only when the pinions 111 of the disks E are raised to engage with the teeth of the upper rack arms 48 of the type bars which action takes place only when the total is to be printed, or the total amounts of a sum are to be repeated.

\Vhen an arm 133 is pressed downward it engages with the pin 121), thus pressing down the arm 119, rocking the shaft 116 and causing the arms 117 and 118 to lift up the series of disks E and at the same time carry from upper positions the stop pa-wls 127, and at the same time the stop bar 121 will be raised, but as the fulcra of the supporting arms 103 are further forward than the fulcraof the arms of the stop bar 121, the stop bar 133 is depressed, will travel upward at about the same speed for a certain distance, after which the stop bar will move upward quicker than the said supporting arms 1023, so as to provide tirst at one period in the elevation of the disks l) the. locking of the said disks and secondly their automatic release from engagement with the locking bar; and this locking engagement of the disks as has been stated takes place while they are in transit between the parallel racks of the type bars (l. 7

The arm 133 is pressed downward by means of what 1 term a total lever l since this lever is brought into operation only when a total is to be printed. The leverl is substantiallyU-shaped, and at itsl'orward lower portion, is provided with a linger 15".) that has bearing upon tl arm 133 as is clearly shown in Fig. 12; and the rear vertical member 136 of the said lever l is 'l'nlcruim-d on the lel'thand inner wall of the casing A as is shown at I 137,while a springmember123Sisdownwardly and rcarwardly carried 'l'rom the lower por- 1 tion of the said member 136 of said lever. \Vhcn a total is to be printed it is necessary t that all of the type bars should be free to l move forward to theirfull extent, since simull taneously with the printing ol' the total of; l l

the sum the ciphers on all of the disks will be in transverse alinemcnt and visible from the front of the machine. To accomplish this result it is necessary that all of the stopl leaves 76 should be depressed, and this is done by carrying an arm 7 6 upward and for ward from the depressing bar 81 which acts upon the spring arm extensions 80 from the said stop leaves 76 as is shown in Fig. 12; and when the arm 133'" has been pressed down a certain distance by the total lever F, the said arm 133 will engage with said arm 76 and cause the bar 81 to simultaneously depress all of the stop leaves 76 and carry them out of the path of all of the type bars '0.

VVhena lower rack arm, 53 of a type bar 0 has acted upon a calculating disk E to turn the same the proper distance, and before the type bar (1 turns to its normal position, the series of disks E should be raised to an intermediate position between the upper and lower racks 48 and 53 and at. said time be locked from turning. This movement of the series of disks i is automatically accomplished at each movement of the carriage B through the medium of the pins 21 extending from the sides of the carriage. These pins act upon elevating dogs 1311 pivoted below the carrying arms 10%; for the said disks, being held in engagement with the lower edges of the said arms by springs 140 as is shown in Figs. 12 and 13. The dogs 13$) are of angular construction and their horizontal upper portions that engage with the arms 103 extend in a rearward direction.

At the rear of the rear ends of the supporting arms 103 for the said disks E a locking bar 141 is vertically located in engagement with each inner side wall of the casing A. These locking bars 141 are provided with 11()t('l1(.s 142 in their forward edges between their centers and their lower ends; and their upper ends 143 are pivoted to the said casing while their lower ends extend downward a sullicient distance to be engaged by the aforesaid pins 31 of the carriage B as is shown in Fig. 12.

The locking bars 141 are pressed forwardly by springs 144 that bear against their rear edges. When the carriage B is in its normal or rearward position, the pins 21 will be in engagement with the lower forward edges of the locking bars 141 and will hold them perpendicularly against the tension of their springs 144. But when the carriage B moves forward to assist in an addition, the pins 21 leave the lockingbars 141 and their springs 144 act to give said locking bars a downward and forward inclination; and when the carriage has reached the limit of its forward movement the pins 21 will have passed bcneath the dogs 13.) and will occupy a posi tion immediately to the rear of them, which position is shown in Fig. (5. ()n the return of the carriage the pins 21 will rock the dogs 139 and will cause the supporting arms 103 tor the disks [*1 to be raised, clearing the teeth of the lower racks 53 ot the type bars and the said arms will be raised a sutlicient 

